33. The lower bound is 2 (the dimension of the piece of paper from which the wad is made) and the upper bound is 3 (the wad lies in three-dimensional space). Low-dimensional wads have a small number of long folds, so on a small scale they look like parallel pieces of paper. High-dimensional wads have a large number of small folds, so on a small scale they still look densely packed. Intermediate dimensional wads have a folds on many scales of length, so there is a corresponding wide distribution of gap sizes.

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